Aftermarket Exhausts Systems are one of the most popular upgrades for any 2017-2019 Chevy/GMC 6.6L L5P Duramax. Installation is typically a straight forward installation and can be completed in your driveway with simple hand tools. When you start shopping for an exhaust, a range of construction options and price points will become apparent. Exhaust Systems are typically offered in stainless steel and aluminized steel for your preference on budget, and application. A performance exhaust will typically add horsepower and torque, decrease the exhaust gas temperatures (EGT's), and can even improve engine efficiency. Many exhausts are offered in either 4" or 5" diameters. Find all the leading manufacturers such as MBRP, Magnaflow, AFE, Banks Power, AP Emission Technologies and more!